The `FeOs-AD` crate builds on the implementation of phase equilibrium calculations in `FeOs` to provide implicit automatic differentiation of properties and phase equilibria based on Helmholtz energy equations of state. Derivatives can be determined for any inputs, like temperature or pressure, but also model parameters.

For now, the most important properties and phase equilibria are implemented:

- from temperature and pressure

- from pressure and entropy

- from pressure and enthalpy

- critical points

- bubble points

- dew points

- tp flash

- pressure, molar entropy, molar enthalpy

Just add the dependency to your `Cargo.toml`